package com.hmk.blogboot.web.admin;


import com.hmk.blogboot.po.Tag;
import com.hmk.blogboot.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {


    //自动注入tag 业务接口
    @Autowired
    private TagService tagService;

    //分页查询
    @GetMapping("/tags")
    public String tags(@PageableDefault(size = 3,sort = {"id"},direction = Sort.Direction.DESC) Pageable pageable,
                       Model model){
        //分页查询数据添加到model
        model.addAttribute("page",tagService.listTag(pageable));
        return "admin/tags";
    }
    /**/
    @GetMapping("/tags/input")
    public String input(Model model){
        model.addAttribute("tag",new Tag());
        return "admin/tags-input";
    }

    //根据id查询，数据填充 tags-input页面展示
    @GetMapping("/tags/{id}/input")
    public String editInput(@PathVariable Long id,Model model){
        model.addAttribute("tag",tagService.getTag(id));
        return "admin/tags-input";
    }
    //新增tag记录
    @PostMapping("/tags")
    public String  post(@Valid Tag tag, BindingResult result, RedirectAttributes attributes){
        //根据分类名称查询tag 这个tag要新增tag
        Tag tag1 = tagService.getTagByName(tag.getName());
        if(tag1 != null){
            result.rejectValue("name","nameError","不能重复添加标签");
        }
        if(result.hasErrors()){
            return "admin/tags-input";
        }
        //tagService接口调用saveTage方法 新增tag添加数据库中
        Tag t = tagService.saveTag(tag);
        if(t == null){
            attributes.addFlashAttribute("message","新增失败");
        }else{
            attributes.addFlashAttribute("message","新增成功");
        }

        return "redirect:/admin/tags";
    }

    /*修改tag*/
    @PostMapping("/tags/{id}")
    public String ediPost(@Valid Tag tag,BindingResult result,@PathVariable Long id,RedirectAttributes attributes){
        //根据前端修改tag,标签名称查询，有查询到
        Tag tag1 = tagService.getTagByName(tag.getName());
        if(tag1 != null){
            result.rejectValue("name","nameError","不能重复添加标签");
        }
        if(result.hasErrors()){
            return  "admin/tags-input";
        }
        //业务接口tagService 调用updateTag方法根据id进行查询，修改tag，保存到数据库中
        Tag t =tagService.updateTag(id,tag);
        if(t == null){
            attributes.addFlashAttribute("message","更新失败");
        }else {
            attributes.addFlashAttribute("message","更新成功");
        }
        return "redirect:/admin/tags";
    }
    @GetMapping("/tags/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes){
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/tags";
    }






}
